Clean up mac start disk
1. Remove Speech Voices
cd /System/Library/Speech/
sudo rm -rf Voices/*
2. Delete All System Logs in OS X
sudo rm -rf /private/var/log/*
3. Delete QuickLook Caches
sudo rm -rf /private/var/folders/
4. Remove Emacs
sudo rm -rf /usr/share/emacs/
5. Delete tmp Files
/private/var/tmp/
6. Trash the Cache
rm -rf ~/Library/Caches/*